debugging information of extern variables

[sumanth <sumanth.gundapneni@xxxxxxxxxxxxxxxxxx>]

Hi ,
       I am using Gcc-4.3.3 and gdb-6.8.
      As far as I know , there is no issue with my gdb . How can I make 
sure debugging information generated by my compiler is correct.
      If my compiler generates wrong debugging information , how can I 
detect it.
      Your help is extremely appreciated


Thanks,
Sumanth G